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Related Concept Videos

The Auditory Ossicles01:11

The Auditory Ossicles

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The auditory ossicles of the middle ear transmit sounds from the air as vibrations to the fluid-filled cochlea. The auditory ossicles consist of two malleus (hammer) bones, two incus (anvil) bones, and two stapes (stirrups), one on each side. These bones develop during the fetal stage and are the ones to ossify first. They are fully mature at birth and do not grow afterward.
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Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...
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Middle Ear Transfer Function in Acromegaly Patients.

Eray Bayindir1,2, Emel Aslantas3, Bulent Can4,5

  • 1Department of Otorhinolaryngology and Head and Neck Surgery, İstanbul Medeniyet University Faculty of Medicine, İstanbul, Türkiye.

The Journal of International Advanced Otology
|May 26, 2025
PubMed
Summary
This summary is machine-generated.

Acromegaly patients show larger ear canal volumes, but middle ear transfer function remains unaffected. This study used wide-band tympanometry to assess hearing in acromegaly survivors.

Keywords:
Acromegalyabsorbancehearing losswide-band tympanometry

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Area of Science:

  • Otolaryngology
  • Endocrinology
  • Audiology

Background:

  • Acromegaly, a disorder of excess growth hormone from the pituitary gland, may affect middle ear function.
  • Investigating these effects is crucial for understanding the full health impact on patients.

Purpose of the Study:

  • To evaluate middle ear transfer functions in acromegaly patients post-surgery.
  • To assess hearing using wide-band tympanometry and pure tone audiometry.

Main Methods:

  • Included 28 acromegaly patients and 29 healthy controls.
  • Utilized pure tone audiometry (PTA), 226 Hz acoustic immitancemetry, and wide-band tympanometry (WBT).

Main Results:

  • Acromegaly patients had significantly worse PTA means than controls (20.73 vs. 12.02).
  • Equivalent ear canal volumes were significantly larger in acromegaly patients (P=.041 at 1000 Hz, P=.023 averaged).
  • No significant differences in WBT absorbance values were found between groups.

Conclusions:

  • Patients with acromegaly exhibit statistically significant increases in equivalent ear canal volumes.
  • These volume changes did not adversely affect middle ear transfer function.